Bunch building mechanism



June 7, R HARTLEY 1,862,054

BUNCH BUILDING MEGHANI SM Filed Jan. 22. 1931 2 Sheets-Sheet l FIE. Z.

INVENTOR. a! l. BY

V ATTORNEYS.

BUNCH BUILDING MECHANI SM Filed Jan. 22. 1931 2 Sheets-Sheet 2 I o 5 522 23; I '85 72 7 86 INVENTOR.

BY .dzec

ATTORNEYS.

Patented June 7, 1932 warren STATES PATENT orr cs All-EC B. HARTLEY, OF WHITINSVIL-LE, MASSACHUSETTS, ASSIGNOR TO WHITIN MA- CHINE VORKS, OF WHITINSVILLE, MASSACHUSETTS, A CORPORATION OF MASSA- CHUSETTS BUNCH BUILDING MECHANISM Application filed January 22, 1931. Serial No. 510,522.

This invention relates to the builder mechanism of a spmning or twistmg frame used for winding weft or filling on a bobbin or other weft carrier. In the winding of such bobbins for automatic looms, it is desirable to place a so-called bunch of weft on the butt of the bobbin before the regular winding begins. This bunch of weft is of very short traverse and decreases very rapidly in diameter in the loom as weft exhaustion approaches but affords a reserve supply of weft thread suflicient for one or two picks of the loom after weft replenishment is indicated.

It is the general object of my invention to provide an improved form of bunch building mechanism for use in wmding weft bobbins.

A more specific object of the invention is to provide a bunch building mechanism of simple and substantial construction which may be conveniently set to produce any desired size or yardage of bunch.

' My invention further relates to arrange ments and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawings, in which Fig. 1 is a front elevation of my improved bunch building mechanism;

Fig. 2 is an enlarged front elevation of certain parts;

Fig. 3 is a view similar to Fig. 2 but showing the parts in a different position, and

Fig 4 is a plan view, partly in section, of the parts shown in Figs. 2 and 3.

Referring to the drawings, I have shown parts of a spinning frame in which a bunch building mechanism of a usual commercial form is embodied. The end frame of the machine is indicated at and supports a fixed spindle rail 11 on which spindles 12 are rotatably mounted. These spindles are rotated by vanyusual driving mechanism and rotate the usual weft bobbins l3. The thread or yarn Y is guided to the bobbins B through travelers T on rings R supported on a ring rail 14.

- The rails 14 are secured to the upper ends of a plurality of lifter rods 15, mounted for vertical sliding movement in the spindle rails 11 and in lower guide rails 16.

The lower end of each lifter rod 15- is con nected to a short chain 17 which is guided overpulleys 18 and 19 and is secured to a longitudinally movable bar 20. One end of the bar 20 is bolted to a plate 22, mounted for longitudinal sliding movement on'a supporting frame member 23.

A builder screw 24 is mounted at one end for free rotation'in a projection 25 of the sliding plate 22 but is heldfrom longitudinal or axial movement therein. The other end of the builder screw 24 is loosely slidable axially in a bearing in the end frame 10.

A builder lever is mounted on a fixed pivot 31 and supports a bracket 32, to which is swiveled a nut 33 threaded on the builder screw 24. A roll 35 is mounted on a bracket 36 adjustable on the builder lever 30 and engages a vertical side surface of an intermediate or cam lever 40, pivoted at 41 on an upward projection of the supporting frame member 23.

The usual heart-shaped builder cam 42 is fixed on a cam shaft 43 which is continuously rotated from a driving pulley 44 (Fig. 1) through spur gears 45 and 46, a worm 47 and a worm gear 48. The cam shaft43 is also provided with a worm,-engaging a Worm gear 50 on an'intermediate shaft 51 connected through gears 52 and 53 to slowly rotate the builder screw 24. V

The-mechanism thus far described is of the usual commercial form andjin itself forms no part of my present invention, which relates particularly to improved means for transmitting motion from the cam shaft 43 to the intermediate or cam lever 40.

Referring to'Fig. 4, a cam follower 55 is secured to a stud 5 6 rotatable in spaced bearings in the intermediate lever 40. This cam follower 55 is provided with a cylindrical peripheral cam-engaging surface 56 for about two-thirds of its circumference but is recessedor cut away as indicated at 57 (Fig. 2) for the remaining third of its surface.

When the cam follower is so positioned that its cylindrical portion 56 engages the heart cam 42, the builder motion acts in the in 8,- the recess 57 of the cam follower 55 will be so positioned that the regular heart cam 42 will be inoperative, as it will not at any point engage the cam follower 55. lVith the parts thus positioned, the'lever 40 will be given frequent short oscillations by the auxiliary cam 60, resulting ii -winding a short-traverse bunch on the butt of each bobbin B.

v I will now describe the' mechanism pro- 'j vided for shifting over from-the bunch building traverse to the regular filling wind traverse when a bunch of the desiredsize has been wound. i V

For this purpose a segment gear 7 0, shown as having three teeth 71, is secured to the auxilia-rycam 60 by a clamping screw 72 (Fig. 4) which maybe placed in any one of a plurality of threaded holes 73 (Fig. 8) in the hub of the auxiliary cam 60. It, is assumed that the spinning frame is supplied with the usual stop motion, which stops the frame with the heart cam 42 always in the same predetermined angular position, preferably the position indicated in Fig. 3.

A gear plate 75 is loosely mounted on the stud 56 adjacent the plate 64 and is held in frictional engagement with the plate by a spring 76 positioned in a recess in a collar 77 secured to the end of the stud 56. The gear plate 75 is provided with a group of three teeth 78 corresponding to the teeth 71 of the gear plate 7 previously described. The gear plate 75 is also provided with several additional single teeth 80, 8-1 and 82, spaced apart by the omission of two intervening teeth.

A stop pin 84 is fixed in the lever in position for engagement by an outwardly extended portion of the plate 64 on which a handle 85 is mounted. Another stop pin 86 is secured in the front side of the plate '64 in position for engagement by the single tooth 82 on the segment gear plate 75. Threaded holes 88 are also-provided in the plate 64, in either of which an additional stop pin may be inserted.

Having described the details of construction of my improved builder mechanism, the method of operation thereof is asfollows When the winding of a set of bobbins is about to begin, the operator turns the plate 64 by the handle 85 in a clockwise direction into engagement with the stop pin 84in the lever 40, in the position indicated in Fig. 3.

In this position, the recess 57 of the cam follower is opposite the regular heart cam 42, which is thereby rendered inoperative, and the stud 62 in the plate 64 is brought into position for engagement by the auxiliary cam as indicated in Figs. 3 and 4.

For a relatively small bunch, the segment gear plate 7 5 may be left in the position indicated in Fig. 3, with the tooth 82in engagement with the stop pin'86. The size of the bunch may be further regulated by the angular setting of the segment gear plate with respect to the stopping position of the heart-cam 42. By varying this angular setting, the weft may be given from one to six or seven short traverses before the teeth 71 of the plate 7 0 engage the teeth. 78 of the plate 75. When such engagement takes place,

the plate is rotated anti-clockwise, carrying the stud 62 out of operative position and 'bringingthe cylindrical'sur'face 56 of the cam follower 55 into position for engagement by the heart cam 42. Such engagement causes further rotation of the cam f0llower 55 by the heart cam until a lug or projection 90 on the plate 64 engages the stop pin 84 on the intermediate lever 40, in which position the parts remain during the further winding of the bobbin.

If a larger bunch 1s deslred, a-stop pin may be inserted in one or the other of the holes 88 and the segment gear plate 75 may be turned clockwise manually before the winding begins until, the end tooth 78 engages the pin in the selected hole 88.

If the pin is place-d in the upper hole, (as viewed in Fig. 3) the teeth 71 will engage the ice single tooth 80 on their first rotation, but 7 this willmerely advance the single tooth 82 into en agement with the stud 86, bringing the teeth 78 into position for engagement by the teeth 71 on the next complete revolution of the auxiliary cam, thus adding eight reciprocations of the short-traverse winding to the size of the bunch. as determined by the setting of the gear plate 70.

By placing the stop pin in the lowerhole 88, two complete rotations of sixteen reciprocations may be added, and by omitting this extra stop pin and turning the end tooth 78 into contact with the stop pin 86, three complete revolutions may be attained.

I are thus able by very simple adjustments to wind a bunch having from one or two reciprocations up as many as twenty-five or thirty reciprocations, according to the-fineness of the yarn and the size ofthe bunch required.

All parts are simple and rugged'in construction and there is nothing about the mechanism which is delicate or liable to be injured or to get out of order. Consequenttended.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim" is 1. In a builder mechanism, a cam shaft, means to continuously rotate said shaft, a builder cam and an auxiliary cam mounted to rotate with said cam shaft, a cam lever, a cam follower mounted on said lever and comprising a rotatable member having a portion cooperating with said builder cam and a second portion cooperating with said auxiliary cam, and means rotatable with said builder cam and intermittently engaging said rotatable member to shift theangular position thereof until the cam follower is operatively positioned with reference to the builder cam.

2. The combination in a builder mechanism as set forth in claim 1, in which said latter means comprises a segmental gear plate rotatable with said cam shaft and intermittently engaging a segmental gear-plate rota-table with said cam follower to angularly advance said follower.

3. The combination in a builder mechanism as set forth in claim 1, in which means is provided for securing said builder and auxiliary cams together in different selected angular relations.

4:. In a builder mechanism, a cam shaft, means to continuously rotate said shaft, a builder cam and an auxiliary cam mounted to rotate with said cam shaft, a cam lever, acam follower mounted on said lever and comprising a rotatable member having a portion cooperating with said builder cam but having a segment cut away, and a second portion cooperating with said auxiliary cam, a segment gear plate rotatable with said cam shaft, and a. second segment gear plate rotatable with said cam follower and intermittently advanced angularly by engagement with said first gear plate, and means to limit such angular movement.

5. The combination in a builder mechanism as set forth in claim i, in which said second gear plate has a series of adjacent teeth formed on one part of its periphery and additional single teeth formed thereon and spaced apart from said-series of teeth and from each other by a plurality of intervening tooth spaces.

In testimony whereof I have hereunto affixed my signature.

ALEC R. HARTLEY. 

